downgrading to 1.1.1 (help me)

i have tried multiple time to down grade my i touch back to firmware 1.1.1
i have loaded many different files and none of them worked
actually the one i did down load turned out to be a 1.1.2 and i upgraded it and got bricked or whatnot
can anybody give me a link/download that they used on a mac that WORKS!!! that will force it back to firmware 1.1.1
please and think you